I have a situation that we need to control the suction pressure (keep it elevated) during hot gas defrost. This is a retro fit install in order to get the room into the 34 degree range. Hot gas will be piped into a Tee set between the Sporlan distributor and the orifice. A liquid line solenoid valve will be present but, not de-energized during defrost.
The evap is an existing air defrost type ( 100,000 BTUH).

I need to keep the suction pressure elevated during defrost only. I was thinking about a suction stop evap pressure regulator but, then I woild only pump down the system and cycle off at the low pressure switch.

Any ideas?